Meridian Atlas

The plant atlas

Every claim traceable to a primary source. No AI slop: guides built from a hand-curated knowledge graph and firsthand experience.

Environment & Climate · 2 min

Vapor Pressure Deficit: The Master Control for Transpiration

A plain-language guide to vapor pressure deficit (VPD): what it measures, the target ranges by growth stage, how to calculate it, and the equipment that holds it steady.

disease · 7 min

Botrytis (Gray Mold): Prevention and Treatment for Indoor Growers

Botrytis cinerea thrives in high humidity and poor airflow. Prevention through VPD management and dehumidification is the best cure.

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